./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/stack_longest-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_803ec965-0757-41d8-9132-e7358841f9b5/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_803ec965-0757-41d8-9132-e7358841f9b5/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_803ec965-0757-41d8-9132-e7358841f9b5/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_803ec965-0757-41d8-9132-e7358841f9b5/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/stack_longest-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_803ec965-0757-41d8-9132-e7358841f9b5/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_803ec965-0757-41d8-9132-e7358841f9b5/bin/uautomizer-verify-aQ6SnzHsRB --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 19:50:48,884 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 19:50:48,985 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_803ec965-0757-41d8-9132-e7358841f9b5/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-27 19:50:48,990 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 19:50:48,991 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 19:50:49,016 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 19:50:49,016 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 19:50:49,017 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 19:50:49,017 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 19:50:49,017 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 19:50:49,017 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 19:50:49,017 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 19:50:49,018 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 19:50:49,018 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 19:50:49,018 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 19:50:49,018 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 19:50:49,019 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-27 19:50:49,019 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 19:50:49,019 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 19:50:49,019 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 19:50:49,019 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 19:50:49,019 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-27 19:50:49,020 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 19:50:49,020 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-27 19:50:49,020 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 19:50:49,020 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-27 19:50:49,020 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 19:50:49,020 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 19:50:49,020 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 19:50:49,020 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 19:50:49,021 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 19:50:49,021 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 19:50:49,021 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 19:50:49,021 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 19:50:49,021 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 19:50:49,021 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 19:50:49,021 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 19:50:49,022 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 19:50:49,022 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 19:50:49,022 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 19:50:49,022 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-27 19:50:49,022 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-27 19:50:49,022 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-27 19:50:49,022 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-27 19:50:49,023 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 19:50:49,023 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 19:50:49,023 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 19:50:49,023 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 19:50:49,023 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_803ec965-0757-41d8-9132-e7358841f9b5/bin/uautomizer-verify-aQ6SnzHsRB Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 [2024-11-27 19:50:49,334 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 19:50:49,343 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 19:50:49,345 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 19:50:49,346 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 19:50:49,347 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 19:50:49,348 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_803ec965-0757-41d8-9132-e7358841f9b5/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/pthread/stack_longest-2.i [2024-11-27 19:50:52,538 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_803ec965-0757-41d8-9132-e7358841f9b5/bin/uautomizer-verify-aQ6SnzHsRB/data/7c4d13e4a/78cf94023cfd451ba510753585693c72/FLAG26f845e5c [2024-11-27 19:50:52,879 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 19:50:52,881 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_803ec965-0757-41d8-9132-e7358841f9b5/sv-benchmarks/c/pthread/stack_longest-2.i [2024-11-27 19:50:52,910 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_803ec965-0757-41d8-9132-e7358841f9b5/bin/uautomizer-verify-aQ6SnzHsRB/data/7c4d13e4a/78cf94023cfd451ba510753585693c72/FLAG26f845e5c [2024-11-27 19:50:52,932 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_803ec965-0757-41d8-9132-e7358841f9b5/bin/uautomizer-verify-aQ6SnzHsRB/data/7c4d13e4a/78cf94023cfd451ba510753585693c72 [2024-11-27 19:50:52,934 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 19:50:52,936 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 19:50:52,938 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 19:50:52,939 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 19:50:52,947 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 19:50:52,947 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 07:50:52" (1/1) ... [2024-11-27 19:50:52,950 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e5aaec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:52, skipping insertion in model container [2024-11-27 19:50:52,950 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 07:50:52" (1/1) ... [2024-11-27 19:50:53,003 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 19:50:53,412 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_803ec965-0757-41d8-9132-e7358841f9b5/sv-benchmarks/c/pthread/stack_longest-2.i[41530,41543] [2024-11-27 19:50:53,441 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 19:50:53,483 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 19:50:53,526 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_803ec965-0757-41d8-9132-e7358841f9b5/sv-benchmarks/c/pthread/stack_longest-2.i[41530,41543] [2024-11-27 19:50:53,533 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 19:50:53,684 INFO L204 MainTranslator]: Completed translation [2024-11-27 19:50:53,684 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:53 WrapperNode [2024-11-27 19:50:53,685 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 19:50:53,687 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 19:50:53,687 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 19:50:53,687 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 19:50:53,695 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:53" (1/1) ... [2024-11-27 19:50:53,742 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:53" (1/1) ... [2024-11-27 19:50:53,820 INFO L138 Inliner]: procedures = 277, calls = 830, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 943 [2024-11-27 19:50:53,821 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 19:50:53,821 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 19:50:53,821 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 19:50:53,821 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 19:50:53,838 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:53" (1/1) ... [2024-11-27 19:50:53,839 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:53" (1/1) ... [2024-11-27 19:50:53,852 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:53" (1/1) ... [2024-11-27 19:50:53,893 INFO L175 MemorySlicer]: Split 809 memory accesses to 3 slices as follows [2, 5, 802]. 99 percent of accesses are in the largest equivalence class. The 807 initializations are split as follows [2, 5, 800]. The 1 writes are split as follows [0, 0, 1]. [2024-11-27 19:50:53,893 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:53" (1/1) ... [2024-11-27 19:50:53,893 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:53" (1/1) ... [2024-11-27 19:50:53,942 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:53" (1/1) ... [2024-11-27 19:50:53,944 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:53" (1/1) ... [2024-11-27 19:50:53,951 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:53" (1/1) ... [2024-11-27 19:50:53,960 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:53" (1/1) ... [2024-11-27 19:50:53,963 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:53" (1/1) ... [2024-11-27 19:50:53,994 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 19:50:53,995 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 19:50:53,995 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 19:50:53,995 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 19:50:53,996 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:53" (1/1) ... [2024-11-27 19:50:54,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 19:50:54,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_803ec965-0757-41d8-9132-e7358841f9b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:50:54,036 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_803ec965-0757-41d8-9132-e7358841f9b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 19:50:54,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_803ec965-0757-41d8-9132-e7358841f9b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 19:50:54,067 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-11-27 19:50:54,067 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-11-27 19:50:54,067 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-11-27 19:50:54,067 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-11-27 19:50:54,067 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-27 19:50:54,068 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-27 19:50:54,068 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-27 19:50:54,068 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-27 19:50:54,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-27 19:50:54,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-27 19:50:54,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-27 19:50:54,069 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-27 19:50:54,069 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 19:50:54,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-27 19:50:54,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-27 19:50:54,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-27 19:50:54,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 19:50:54,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 19:50:54,071 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-27 19:50:54,210 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 19:50:54,213 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 19:50:55,781 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-27 19:50:55,781 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 19:51:11,698 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 19:51:11,698 INFO L312 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-27 19:51:11,699 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 07:51:11 BoogieIcfgContainer [2024-11-27 19:51:11,699 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 19:51:11,702 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 19:51:11,703 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 19:51:11,708 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 19:51:11,709 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 07:50:52" (1/3) ... [2024-11-27 19:51:11,709 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@655ce1c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 07:51:11, skipping insertion in model container [2024-11-27 19:51:11,710 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:53" (2/3) ... [2024-11-27 19:51:11,710 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@655ce1c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 07:51:11, skipping insertion in model container [2024-11-27 19:51:11,710 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 07:51:11" (3/3) ... [2024-11-27 19:51:11,712 INFO L128 eAbstractionObserver]: Analyzing ICFG stack_longest-2.i [2024-11-27 19:51:11,730 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 19:51:11,734 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG stack_longest-2.i that has 3 procedures, 30 locations, 1 initial locations, 2 loop locations, and 2 error locations. [2024-11-27 19:51:11,734 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-27 19:51:11,842 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-27 19:51:11,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 36 places, 34 transitions, 82 flow [2024-11-27 19:51:11,982 INFO L124 PetriNetUnfolderBase]: 5/32 cut-off events. [2024-11-27 19:51:11,986 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-27 19:51:11,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 32 events. 5/32 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 60 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 29. Up to 3 conditions per place. [2024-11-27 19:51:11,992 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 34 transitions, 82 flow [2024-11-27 19:51:11,997 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 32 places, 30 transitions, 69 flow [2024-11-27 19:51:12,010 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 19:51:12,028 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3fa793d2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 19:51:12,033 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-11-27 19:51:12,103 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-27 19:51:12,104 INFO L124 PetriNetUnfolderBase]: 1/18 cut-off events. [2024-11-27 19:51:12,104 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-27 19:51:12,104 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:51:12,105 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:12,106 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-27 19:51:12,111 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:12,112 INFO L85 PathProgramCache]: Analyzing trace with hash -832202332, now seen corresponding path program 1 times [2024-11-27 19:51:12,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:12,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944584556] [2024-11-27 19:51:12,122 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:12,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:12,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:13,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:13,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:13,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944584556] [2024-11-27 19:51:13,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944584556] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:51:13,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:51:13,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 19:51:13,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828897541] [2024-11-27 19:51:13,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:51:13,394 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 19:51:13,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:13,429 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 19:51:13,430 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 19:51:13,438 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-11-27 19:51:13,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 30 transitions, 69 flow. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:13,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:51:13,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-11-27 19:51:13,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:51:13,830 INFO L124 PetriNetUnfolderBase]: 307/576 cut-off events. [2024-11-27 19:51:13,830 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-11-27 19:51:13,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1132 conditions, 576 events. 307/576 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2546 event pairs, 53 based on Foata normal form. 43/582 useless extension candidates. Maximal degree in co-relation 1055. Up to 358 conditions per place. [2024-11-27 19:51:13,837 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 41 selfloop transitions, 3 changer transitions 2/52 dead transitions. [2024-11-27 19:51:13,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 52 transitions, 214 flow [2024-11-27 19:51:13,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 19:51:13,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 19:51:13,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 83 transitions. [2024-11-27 19:51:13,852 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6102941176470589 [2024-11-27 19:51:13,854 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 69 flow. Second operand 4 states and 83 transitions. [2024-11-27 19:51:13,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 52 transitions, 214 flow [2024-11-27 19:51:13,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 52 transitions, 205 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-27 19:51:13,864 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 82 flow [2024-11-27 19:51:13,867 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=82, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2024-11-27 19:51:13,870 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 2 predicate places. [2024-11-27 19:51:13,871 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 82 flow [2024-11-27 19:51:13,871 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:13,871 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:51:13,871 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:13,872 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-27 19:51:13,872 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-27 19:51:13,872 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:13,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1550159873, now seen corresponding path program 1 times [2024-11-27 19:51:13,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:13,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525750128] [2024-11-27 19:51:13,873 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:13,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:13,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:15,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:15,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:15,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525750128] [2024-11-27 19:51:15,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525750128] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:51:15,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964361834] [2024-11-27 19:51:15,004 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:15,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:15,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_803ec965-0757-41d8-9132-e7358841f9b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:51:15,008 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_803ec965-0757-41d8-9132-e7358841f9b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:51:15,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_803ec965-0757-41d8-9132-e7358841f9b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-27 19:51:15,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:15,491 INFO L256 TraceCheckSpWp]: Trace formula consists of 1719 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-27 19:51:15,500 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:51:15,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-27 19:51:15,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:15,693 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:51:15,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:15,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964361834] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:51:15,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:51:15,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-27 19:51:15,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753489470] [2024-11-27 19:51:15,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:51:15,819 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-27 19:51:15,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:15,820 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-27 19:51:15,820 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-27 19:51:15,824 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2024-11-27 19:51:15,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 82 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:15,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:51:15,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2024-11-27 19:51:15,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:51:16,937 INFO L124 PetriNetUnfolderBase]: 1257/2340 cut-off events. [2024-11-27 19:51:16,937 INFO L125 PetriNetUnfolderBase]: For 301/303 co-relation queries the response was YES. [2024-11-27 19:51:16,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4928 conditions, 2340 events. 1257/2340 cut-off events. For 301/303 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 12430 event pairs, 153 based on Foata normal form. 49/2288 useless extension candidates. Maximal degree in co-relation 4364. Up to 365 conditions per place. [2024-11-27 19:51:16,965 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 163 selfloop transitions, 32 changer transitions 4/204 dead transitions. [2024-11-27 19:51:16,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 204 transitions, 900 flow [2024-11-27 19:51:16,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-27 19:51:16,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-27 19:51:16,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 313 transitions. [2024-11-27 19:51:16,973 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6137254901960785 [2024-11-27 19:51:16,973 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 82 flow. Second operand 15 states and 313 transitions. [2024-11-27 19:51:16,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 204 transitions, 900 flow [2024-11-27 19:51:16,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 204 transitions, 896 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-27 19:51:16,982 INFO L231 Difference]: Finished difference. Result has 54 places, 66 transitions, 329 flow [2024-11-27 19:51:16,982 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=329, PETRI_PLACES=54, PETRI_TRANSITIONS=66} [2024-11-27 19:51:16,983 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 22 predicate places. [2024-11-27 19:51:16,983 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 66 transitions, 329 flow [2024-11-27 19:51:16,984 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:16,984 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:51:16,984 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:16,993 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_803ec965-0757-41d8-9132-e7358841f9b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-27 19:51:17,184 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_803ec965-0757-41d8-9132-e7358841f9b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:17,185 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-27 19:51:17,185 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:17,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1380081623, now seen corresponding path program 1 times [2024-11-27 19:51:17,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:17,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79279469] [2024-11-27 19:51:17,186 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:17,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:17,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:17,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:17,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:17,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79279469] [2024-11-27 19:51:17,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79279469] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:51:17,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:51:17,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 19:51:17,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329540400] [2024-11-27 19:51:17,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:51:17,755 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 19:51:17,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:17,756 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 19:51:17,756 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 19:51:17,757 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-11-27 19:51:17,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 66 transitions, 329 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:17,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:51:17,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-11-27 19:51:17,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:51:18,134 INFO L124 PetriNetUnfolderBase]: 669/1355 cut-off events. [2024-11-27 19:51:18,135 INFO L125 PetriNetUnfolderBase]: For 603/603 co-relation queries the response was YES. [2024-11-27 19:51:18,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3066 conditions, 1355 events. 669/1355 cut-off events. For 603/603 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 6858 event pairs, 231 based on Foata normal form. 66/1406 useless extension candidates. Maximal degree in co-relation 2918. Up to 634 conditions per place. [2024-11-27 19:51:18,148 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 43 selfloop transitions, 4 changer transitions 0/59 dead transitions. [2024-11-27 19:51:18,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 59 transitions, 339 flow [2024-11-27 19:51:18,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 19:51:18,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 19:51:18,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 58 transitions. [2024-11-27 19:51:18,150 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5686274509803921 [2024-11-27 19:51:18,150 INFO L175 Difference]: Start difference. First operand has 54 places, 66 transitions, 329 flow. Second operand 3 states and 58 transitions. [2024-11-27 19:51:18,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 59 transitions, 339 flow [2024-11-27 19:51:18,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 59 transitions, 307 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-11-27 19:51:18,167 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 198 flow [2024-11-27 19:51:18,168 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2024-11-27 19:51:18,169 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 18 predicate places. [2024-11-27 19:51:18,169 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 198 flow [2024-11-27 19:51:18,170 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:18,170 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:51:18,170 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:18,171 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-27 19:51:18,171 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-27 19:51:18,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:18,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1227572384, now seen corresponding path program 1 times [2024-11-27 19:51:18,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:18,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477917016] [2024-11-27 19:51:18,173 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:18,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:18,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:20,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:20,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:20,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477917016] [2024-11-27 19:51:20,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477917016] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:51:20,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:51:20,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 19:51:20,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015115246] [2024-11-27 19:51:20,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:51:20,487 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 19:51:20,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:20,487 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 19:51:20,487 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 19:51:20,494 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2024-11-27 19:51:20,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 198 flow. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:20,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:51:20,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2024-11-27 19:51:20,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:51:20,856 INFO L124 PetriNetUnfolderBase]: 753/1490 cut-off events. [2024-11-27 19:51:20,856 INFO L125 PetriNetUnfolderBase]: For 505/505 co-relation queries the response was YES. [2024-11-27 19:51:20,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3477 conditions, 1490 events. 753/1490 cut-off events. For 505/505 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 7371 event pairs, 221 based on Foata normal form. 0/1446 useless extension candidates. Maximal degree in co-relation 3097. Up to 1035 conditions per place. [2024-11-27 19:51:20,866 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 64 selfloop transitions, 5 changer transitions 6/80 dead transitions. [2024-11-27 19:51:20,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 80 transitions, 436 flow [2024-11-27 19:51:20,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 19:51:20,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 19:51:20,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 93 transitions. [2024-11-27 19:51:20,868 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5470588235294118 [2024-11-27 19:51:20,868 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 198 flow. Second operand 5 states and 93 transitions. [2024-11-27 19:51:20,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 80 transitions, 436 flow [2024-11-27 19:51:20,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 80 transitions, 426 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-27 19:51:20,877 INFO L231 Difference]: Finished difference. Result has 55 places, 52 transitions, 230 flow [2024-11-27 19:51:20,878 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=230, PETRI_PLACES=55, PETRI_TRANSITIONS=52} [2024-11-27 19:51:20,879 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 23 predicate places. [2024-11-27 19:51:20,879 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 52 transitions, 230 flow [2024-11-27 19:51:20,880 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:20,880 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:51:20,880 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:20,880 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-27 19:51:20,880 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-27 19:51:20,880 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:20,881 INFO L85 PathProgramCache]: Analyzing trace with hash -2069678571, now seen corresponding path program 1 times [2024-11-27 19:51:20,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:20,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539119475] [2024-11-27 19:51:20,881 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:20,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:20,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:22,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:22,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:22,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539119475] [2024-11-27 19:51:22,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539119475] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:51:22,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706004522] [2024-11-27 19:51:22,758 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:22,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:22,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_803ec965-0757-41d8-9132-e7358841f9b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:51:22,760 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_803ec965-0757-41d8-9132-e7358841f9b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:51:22,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_803ec965-0757-41d8-9132-e7358841f9b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-27 19:51:23,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:23,228 INFO L256 TraceCheckSpWp]: Trace formula consists of 1764 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-27 19:51:23,237 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:51:23,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-27 19:51:23,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 1 [2024-11-27 19:51:23,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 32 [2024-11-27 19:51:23,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:23,616 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:51:24,072 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2024-11-27 19:51:24,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:24,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706004522] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:51:24,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:51:24,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2024-11-27 19:51:24,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082284937] [2024-11-27 19:51:24,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:51:24,146 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-27 19:51:24,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:24,147 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-27 19:51:24,147 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2024-11-27 19:51:24,149 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2024-11-27 19:51:24,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 52 transitions, 230 flow. Second operand has 15 states, 15 states have (on average 10.6) internal successors, (159), 15 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:24,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:51:24,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2024-11-27 19:51:24,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:51:26,851 INFO L124 PetriNetUnfolderBase]: 2063/4053 cut-off events. [2024-11-27 19:51:26,852 INFO L125 PetriNetUnfolderBase]: For 1623/1623 co-relation queries the response was YES. [2024-11-27 19:51:26,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9121 conditions, 4053 events. 2063/4053 cut-off events. For 1623/1623 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 24011 event pairs, 250 based on Foata normal form. 0/3946 useless extension candidates. Maximal degree in co-relation 8131. Up to 659 conditions per place. [2024-11-27 19:51:26,885 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 276 selfloop transitions, 64 changer transitions 40/385 dead transitions. [2024-11-27 19:51:26,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 385 transitions, 1997 flow [2024-11-27 19:51:26,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-27 19:51:26,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-11-27 19:51:26,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 607 transitions. [2024-11-27 19:51:26,890 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5409982174688057 [2024-11-27 19:51:26,890 INFO L175 Difference]: Start difference. First operand has 55 places, 52 transitions, 230 flow. Second operand 33 states and 607 transitions. [2024-11-27 19:51:26,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 385 transitions, 1997 flow [2024-11-27 19:51:26,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 385 transitions, 1992 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-27 19:51:26,912 INFO L231 Difference]: Finished difference. Result has 91 places, 99 transitions, 624 flow [2024-11-27 19:51:26,913 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=624, PETRI_PLACES=91, PETRI_TRANSITIONS=99} [2024-11-27 19:51:26,915 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 59 predicate places. [2024-11-27 19:51:26,915 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 99 transitions, 624 flow [2024-11-27 19:51:26,916 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 10.6) internal successors, (159), 15 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:26,916 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:51:26,916 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:26,930 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_803ec965-0757-41d8-9132-e7358841f9b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-27 19:51:27,117 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_803ec965-0757-41d8-9132-e7358841f9b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:27,117 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-27 19:51:27,118 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:27,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1192969694, now seen corresponding path program 1 times [2024-11-27 19:51:27,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:27,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779515329] [2024-11-27 19:51:27,118 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:27,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:27,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:27,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:27,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:27,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779515329] [2024-11-27 19:51:27,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779515329] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:51:27,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306661978] [2024-11-27 19:51:27,809 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:27,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:27,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_803ec965-0757-41d8-9132-e7358841f9b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:51:27,811 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_803ec965-0757-41d8-9132-e7358841f9b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:51:27,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_803ec965-0757-41d8-9132-e7358841f9b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-27 19:51:28,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:28,188 INFO L256 TraceCheckSpWp]: Trace formula consists of 1791 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 19:51:28,193 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:51:28,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-27 19:51:28,289 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-27 19:51:28,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:28,523 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:51:28,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 19:51:28,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306661978] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 19:51:28,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-27 19:51:28,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 6] total 12 [2024-11-27 19:51:28,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054169444] [2024-11-27 19:51:28,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:51:28,589 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 19:51:28,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:28,590 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 19:51:28,590 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2024-11-27 19:51:28,594 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2024-11-27 19:51:28,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 99 transitions, 624 flow. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:28,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:51:28,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2024-11-27 19:51:28,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:51:29,376 INFO L124 PetriNetUnfolderBase]: 2343/4644 cut-off events. [2024-11-27 19:51:29,376 INFO L125 PetriNetUnfolderBase]: For 3777/3777 co-relation queries the response was YES. [2024-11-27 19:51:29,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10939 conditions, 4644 events. 2343/4644 cut-off events. For 3777/3777 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 28658 event pairs, 629 based on Foata normal form. 18/4625 useless extension candidates. Maximal degree in co-relation 10366. Up to 1553 conditions per place. [2024-11-27 19:51:29,421 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 81 selfloop transitions, 59 changer transitions 2/147 dead transitions. [2024-11-27 19:51:29,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 147 transitions, 1088 flow [2024-11-27 19:51:29,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 19:51:29,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-27 19:51:29,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-11-27 19:51:29,423 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5490196078431373 [2024-11-27 19:51:29,423 INFO L175 Difference]: Start difference. First operand has 91 places, 99 transitions, 624 flow. Second operand 6 states and 112 transitions. [2024-11-27 19:51:29,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 147 transitions, 1088 flow [2024-11-27 19:51:29,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 147 transitions, 1033 flow, removed 25 selfloop flow, removed 1 redundant places. [2024-11-27 19:51:29,443 INFO L231 Difference]: Finished difference. Result has 97 places, 110 transitions, 820 flow [2024-11-27 19:51:29,444 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=573, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=820, PETRI_PLACES=97, PETRI_TRANSITIONS=110} [2024-11-27 19:51:29,444 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 65 predicate places. [2024-11-27 19:51:29,445 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 110 transitions, 820 flow [2024-11-27 19:51:29,445 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:29,445 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:51:29,445 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:29,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_803ec965-0757-41d8-9132-e7358841f9b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-27 19:51:29,645 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_803ec965-0757-41d8-9132-e7358841f9b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:29,646 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-27 19:51:29,646 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:29,647 INFO L85 PathProgramCache]: Analyzing trace with hash -563846644, now seen corresponding path program 1 times [2024-11-27 19:51:29,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:29,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673758975] [2024-11-27 19:51:29,647 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:29,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:29,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:32,024 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:32,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:32,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673758975] [2024-11-27 19:51:32,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673758975] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:51:32,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266733736] [2024-11-27 19:51:32,026 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:32,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:32,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_803ec965-0757-41d8-9132-e7358841f9b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:51:32,028 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_803ec965-0757-41d8-9132-e7358841f9b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:51:32,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_803ec965-0757-41d8-9132-e7358841f9b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-27 19:51:32,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:32,561 INFO L256 TraceCheckSpWp]: Trace formula consists of 1789 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-27 19:51:32,568 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:51:32,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-27 19:51:32,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 19 [2024-11-27 19:51:33,021 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 32 [2024-11-27 19:51:33,082 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:33,083 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:51:33,812 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 19:51:33,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 12 [2024-11-27 19:51:33,860 INFO L349 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2024-11-27 19:51:33,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 63 [2024-11-27 19:51:33,960 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:33,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266733736] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:51:33,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:51:33,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-11-27 19:51:33,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858966922] [2024-11-27 19:51:33,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:51:33,962 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-27 19:51:33,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:33,963 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-27 19:51:33,963 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2024-11-27 19:51:33,966 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2024-11-27 19:51:33,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 110 transitions, 820 flow. Second operand has 17 states, 17 states have (on average 11.058823529411764) internal successors, (188), 17 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:33,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:51:33,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2024-11-27 19:51:33,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:51:37,644 INFO L124 PetriNetUnfolderBase]: 5168/10209 cut-off events. [2024-11-27 19:51:37,645 INFO L125 PetriNetUnfolderBase]: For 13310/13310 co-relation queries the response was YES. [2024-11-27 19:51:37,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25165 conditions, 10209 events. 5168/10209 cut-off events. For 13310/13310 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 69009 event pairs, 1009 based on Foata normal form. 63/10235 useless extension candidates. Maximal degree in co-relation 24360. Up to 1688 conditions per place. [2024-11-27 19:51:37,757 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 269 selfloop transitions, 162 changer transitions 48/484 dead transitions. [2024-11-27 19:51:37,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 484 transitions, 3513 flow [2024-11-27 19:51:37,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-27 19:51:37,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-11-27 19:51:37,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 559 transitions. [2024-11-27 19:51:37,762 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.530360531309298 [2024-11-27 19:51:37,762 INFO L175 Difference]: Start difference. First operand has 97 places, 110 transitions, 820 flow. Second operand 31 states and 559 transitions. [2024-11-27 19:51:37,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 484 transitions, 3513 flow [2024-11-27 19:51:37,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 484 transitions, 3411 flow, removed 29 selfloop flow, removed 1 redundant places. [2024-11-27 19:51:37,833 INFO L231 Difference]: Finished difference. Result has 136 places, 210 transitions, 2074 flow [2024-11-27 19:51:37,833 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=788, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2074, PETRI_PLACES=136, PETRI_TRANSITIONS=210} [2024-11-27 19:51:37,834 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 104 predicate places. [2024-11-27 19:51:37,835 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 210 transitions, 2074 flow [2024-11-27 19:51:37,835 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 11.058823529411764) internal successors, (188), 17 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:37,835 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:51:37,836 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2024-11-27 19:51:37,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_803ec965-0757-41d8-9132-e7358841f9b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-27 19:51:38,036 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_803ec965-0757-41d8-9132-e7358841f9b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:38,036 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-27 19:51:38,037 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:38,037 INFO L85 PathProgramCache]: Analyzing trace with hash -169799280, now seen corresponding path program 2 times [2024-11-27 19:51:38,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:38,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727489070] [2024-11-27 19:51:38,037 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:51:38,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:38,127 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:51:38,127 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:51:38,962 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:38,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:38,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727489070] [2024-11-27 19:51:38,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727489070] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:51:38,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766557860] [2024-11-27 19:51:38,963 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:51:38,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:38,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_803ec965-0757-41d8-9132-e7358841f9b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:51:38,967 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_803ec965-0757-41d8-9132-e7358841f9b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:51:38,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_803ec965-0757-41d8-9132-e7358841f9b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-27 19:51:39,357 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:51:39,357 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:51:39,362 INFO L256 TraceCheckSpWp]: Trace formula consists of 1800 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-27 19:51:39,368 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:51:39,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-27 19:51:39,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-27 19:51:39,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-27 19:51:39,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-27 19:51:39,677 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:39,677 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:51:39,868 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:39,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766557860] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:51:39,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:51:39,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-11-27 19:51:39,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336799519] [2024-11-27 19:51:39,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:51:39,870 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-27 19:51:39,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:39,872 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-27 19:51:39,872 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2024-11-27 19:51:39,874 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2024-11-27 19:51:39,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 210 transitions, 2074 flow. Second operand has 19 states, 19 states have (on average 10.578947368421053) internal successors, (201), 19 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:39,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:51:39,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2024-11-27 19:51:39,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:51:44,064 INFO L124 PetriNetUnfolderBase]: 10174/19904 cut-off events. [2024-11-27 19:51:44,064 INFO L125 PetriNetUnfolderBase]: For 42273/42273 co-relation queries the response was YES. [2024-11-27 19:51:44,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53521 conditions, 19904 events. 10174/19904 cut-off events. For 42273/42273 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 150337 event pairs, 1807 based on Foata normal form. 174/20076 useless extension candidates. Maximal degree in co-relation 51835. Up to 3297 conditions per place. [2024-11-27 19:51:44,263 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 450 selfloop transitions, 339 changer transitions 26/820 dead transitions. [2024-11-27 19:51:44,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 820 transitions, 7222 flow [2024-11-27 19:51:44,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-27 19:51:44,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2024-11-27 19:51:44,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 846 transitions. [2024-11-27 19:51:44,268 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5183823529411765 [2024-11-27 19:51:44,269 INFO L175 Difference]: Start difference. First operand has 136 places, 210 transitions, 2074 flow. Second operand 48 states and 846 transitions. [2024-11-27 19:51:44,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 820 transitions, 7222 flow [2024-11-27 19:51:44,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 820 transitions, 7054 flow, removed 81 selfloop flow, removed 2 redundant places. [2024-11-27 19:51:44,689 INFO L231 Difference]: Finished difference. Result has 191 places, 413 transitions, 4974 flow [2024-11-27 19:51:44,690 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2030, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=4974, PETRI_PLACES=191, PETRI_TRANSITIONS=413} [2024-11-27 19:51:44,692 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 159 predicate places. [2024-11-27 19:51:44,692 INFO L471 AbstractCegarLoop]: Abstraction has has 191 places, 413 transitions, 4974 flow [2024-11-27 19:51:44,693 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 10.578947368421053) internal successors, (201), 19 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:44,693 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:51:44,693 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:44,707 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_803ec965-0757-41d8-9132-e7358841f9b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-27 19:51:44,893 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_803ec965-0757-41d8-9132-e7358841f9b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:44,894 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-27 19:51:44,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:44,894 INFO L85 PathProgramCache]: Analyzing trace with hash 397091792, now seen corresponding path program 2 times [2024-11-27 19:51:44,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:44,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842642014] [2024-11-27 19:51:44,895 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:51:44,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:45,285 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:51:45,285 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat